Pyrefly
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
2recommend
0warn against
Nov 30, 2025first mention
Oct 24, 2026latest mention
Why people recommend it
“purely on a type checking front, it's excellent”
Python programmeron “Bringing uv and ty together”
“Currently we are working on typing our API with Tensor shapes with Pyrefly”
Caveats and dissent
No one in these comments warned against it.
Often compared with
Who recommends it in their own words
Threads where it came up
- Bringing uv and ty together 2 mentions
- Ask HN: What are you working on? (September 2026) 1 mention
- Ty – A fast Python type checker, written in Rust 1 mention
Data: pyrefly.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 4
“purely on a type checking front, it's excellent”
“pyrefly seems to me to be the furthest along with support for many common libraries”
“Currently we are working on typing our API with Tensor shapes with Pyrefly”
“switched a few decently-sized python codebases from MyPy (which I used for years) to PyreFly”